Link's First Custom Cube: Virtual Booster

Singularity    R  Enchantment When Singularity enters the battlefield, exile all other nonland permanents until Singularity leaves the battlefield.	No more uncommons	No more uncommons	No more uncommons	Sparrow Griffin    C  Creature – Griffin Flying Whenever a creature enters the battlefield under an opponent's control, return Sparrow Griffin to its owner's hand. 2/1
Mangrove Line    C  Land – Forest Island (: Add or to your mana pool.) When Mangrove Line enters the battlefield, sacrifice it unless you pay .	Conscious Erosion    C  Instant Target player draws two cards, then discards two cards. Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)	Darry, Steadfast Warden    C  Legendary Creature – Kithkin First strike, protection from creatures with power 3 or greater Whenever a creature with power 2 or less enters the battlefield, you gain 1 life. 2/1	Isperia's Den    C  Legendary Land – Plains Island (: Add or to your mana pool.)	Everlasting Vigil    C  Enchantment Creatures you control have vigilance and lifelink. At the beginning of your upkeep, return target creature card with power 2 or less from your graveyard to the battlefield.
Eira, Merciful Blade    C  Legendary Creature – Angel Flying, haste When Eira, Merciful Blade enters the battlefield, you may return target legendary or planeswalker card from your graveyard to the battlefield. It gains haste until end of turn. 4/4	Dance for New Growth    C  Instant Choose any number — • Put a +1/+1 counter on target creature. • Put target card from a graveyard on top of its owner's library. • Untap up to two target creatures. Dance for New Growth costs more to cast for each mode chosen beyond the first.	Eternity Canvas    C  Enchantment At the beginning of each player's upkeep, that player exiles the top two cards of his or her library. Until end of turn, that player may play cards exiled this way. Paint the horizon.	Transmogrify    C  Instant Exile target nonland permanent an opponent controls. That player exiles cards from the top of his or her library until he or she reveals a creature card, then puts that card onto the battlefield.	Mazeform Phantasm    C  Creature – Illusion Whenever Mazeform Phantasm becomes tapped or untapped, each opponent puts the top two cards of his or her library into his or her graveyard. 1/1

Singularity (rare)
Sparrow Griffin (common)
Mangrove Line (common)
Conscious Erosion (common)
Darry, Steadfast Warden (common)
Isperia's Den (common)
Everlasting Vigil (common)
Eira, Merciful Blade (common)
Dance for New Growth (common)
Eternity Canvas (common)
Transmogrify (common)
Mazeform Phantasm (common)